Machine for molding glass articles



'v. E. HoFMANN MACHINE FOR MOLDING vGLASS ARTICLES Oct. 22, 1935.

8 Sheets-Skaai'.` Il.v

Filed May 5l, 1955 IE- Z- 40 mun Oct. 22, 1935. v. E. HOFMANN u2,018,021

MACHINE FOR MOLDING GLAss ARTICLES Filed Maysl, 193s s sheets-shaml 2 xI l Oct. 22, 1935.. f v. E. HOFMANN MACHINE FOR MOLDING GLASS ARTICLESFiled May 5l, 1933 8 Sheets-Sheet 3 Oct. 22, 1935. v. E. Hor-MANNMACHINE FOR MOLDAING GLASS ARTICLES Filed May 31, 1935 8 Sheets-Sheet 4Odi. 22, 1935. 4 E, HOFMANN 2,018,021

MACHINE FOR MOLDING GLASS ARTICLES Oct. 22, 1935. ,v. E. HOFMANN MACHINEFOR MOLDING GLASS ARTICLES Filea May 31, 1953 8 Sheets-Sheet 6 Oct. 22,193s. y, E., HOFMANN 2,018,021

45 'TI-Erl- Oct. 22, 1935. v. E. HoFMANN v MACHINE FOR MOLDING GLASSARTICLES Filed May 31, 1935 8 Sheets-Sheet 8 P,...gsd o.. 22.1935 I2,013,021

UNITED [STATES PATENT OFFICE MACHINE' Fon Momma GLASS ARTICLES Victor E.Hofmann, Toledo, Qhio, assigner to Ow-Illinois Glass Company, acorporation of o Application May s1, 1933, serial No. 673,645

. iaclaims. (ol. 49-9) My invention relates to machines for mold- Fig. 1is a sectional elevation of one head or ing glassware including bottles,jars and variunit of an Owens type suction gathering maous otherarticles, and particularly to those types `chine to which the presentinvention is applied. of machines in which the molds are made in Fig. 2is a fragmentary lside elevation of a partible sections. In suc-hmachines the partible finishing mold unit comprising a nishing mold meldhalves or sections are ordinarily mounted and its operating mechanism.on pivoted arms, the mold sections being sepa- Fig. 3 is a partsectional plan' view taken at rated by. a. pivotal movement of the moldcarthe linefIII-III on Fig. 1, showing the iinishf rying arms, so thatthe mold sections move in ing mold unit. arcs of circles as they areseparated. Inthe Fig. 4 is a View similar to Fig. 3,'b1'1t with 10manufacture of many different shapesy of botthe mold sections separateda short distance by4 tles and other articles of irregular shapes, andtheir straight line movement from aclosed posialso articles havinglettering or other surfacel tion. ornamentation, considerable dinlcultyhas been Fig. 5 is a similar view with the molds f experienced owingtothe tendency of the molds opened. l5 todistort the ware or moldedsurfaces when the Figs. 6 to 12, inclusive, illustrate a modiiled moldsections are separated inthe manner above construction in which theinitial opening movef noted. Also when the molds are separated by mentof the mold sections is controlled by springsv a pivotal movement, thereis often a binding acinstead of air motors. tion whichcauses the-moldedarticle to stick to Fig. 6 is a plan view ofthe nlshing mold 2o themold. An objeet of the present invention unit, the mold being shown inclosed position.

is to overcome such difculties and objections and Fig. 7 'is a sideelevation of the same. also provide a construction whichv will permitFig. 8 is a view similar to Fig. 6, but with the deeper lettering andsurface. ornamentation of mold sections drawn apart to the positionasthe molded articles without distortion. sumed at the completion oftheir. straight line 25 My invention provides means by which theparmovement.

tlble mold halves can be given an initial opening Fig. 9 isafrontelevation showing the mold fully movement in a straight'line, arr objectof the opened. invention being to provide such means in a con- Fig. 10is a front elevation of the finishing struction embodying comparativelyslight modimold unit with the mold sections in the position 30 catlonsof machines or mold operating mechavshown in Fig. 8. nism of standardconstruction. Fig. 11 is a. ,s ectional elevation at the line In themanufacture of panel ware or other X--XI on Fig. 8, but with the moldsection articles which are substantially square or recremoved. tangularin crosssection, it is common practice Fig. 12 is a section at the lineXII--XII on Fig. 35

f to eutthe mold cavities diagonally in the molds 8, with the moldsection removed. Y

in such manner that the inner faces of the mold Figsc 13 to 17illustrate a further modifica sections meet along the corners of thearticle. tion in which the initial opening movement of This has beenfound necessary in order to permit the mold is effected by means ofcams.

4u separation of the mold halves without distorting Fig. 13 is a planview of the mold unit. l 40 the molded articleU An object of the presentin` Fig. 1-iy is a sectional side elevation.

vention is to provide a construction permitting Fig. 15 is a section atthe line XV--XV on the mold cavities to be arranged normally to theFig.14. meeting faces of themold so that the sides of Fig. 16 is a planView similar to Fig. 13, but

such rectangular articlesl will be parallel with with the mold sectionsseparated by their straight )i5 and perpendicular to the meeting facesofthe line movement.

mold sections. This materially simplifles and Fig. 17 is a 4similarview, but with lthe mold facilitates the cutting of .the molds,'permitssurfully opened. v face ornamentation, lettering, etc., which is iin-Referring particularly to Figs. 1 to 5, the inf practical or impossiblewith the diagonal ar` vention is shown as embodied in an O wens type 60rangement, and possesses-various other:A advansuction gathering machine.The machine comtages. -prises a mold carriage 20 rotated continuouslyother objects of the -invention will appear/I about averticalaxls `bymeans of a driving pin- ,f hereinafter. A lon'2l which meshes with aringgear 22 on the' In the aGCOmPnyin drawnl: mold carnage. The machineincludes an annu-r 5.5

lar series of heads or mold units, only one of which is herein shown,each comprising a dip frame 23 mounted for up and down movement on themold carriage for lifting and lowering the parison mold. The latterincludes a body blank mold (not shown), and a neck mold 24, eachcomprising a pair of separable sections mounted on arms which swingabout a pivot pin 25 for opening and closing the molds. The dip frame 23is lifted and lowered by means of a stationary cam 26 having operatingconnections with the vdip frame through a slide block 21 and bell cranklever 28. When the dip frame is lowered, the combined neck mold and bodyblank mold gather their charge of `glass by suction from a pool ofmolten glass, the suction being applied to the mold through a head 29. Aplunger 38 operatesin a well known manner to form an initialblow openingin the parison, the plunger being lowered by a rack and gear segment3|.y

The latter is formed with a cam which operates through a lever 32 formoving a blow slide valve 33 to and from a position for supplying airunder pressure to the molds for blowing the parison, the air beingsupplied through a pipe 35.

Cooperating with each blank mold unit is a finishing mold unitcomprising a mold carrying frame 36 having trunnions 31 by which it ismounted to swing up and down about a horizontal axis, said swingingmovements being con- `trolled by a stationary cam track 38 on which runsa roll 39 carried by the frame 36. 'I'he ilnishing mold 48 comprisesseparable sections adapted to be'closed about a parison -4 I suspendedfrom the neck mold after the body blank mold is opened and the ilnishingmold has swung upward as shown in Fig. l. The parts thus far describedmay be of standard construction and do not in themselves form a part ofthe present invention.

The parable mom sections 4o may, as usual. Y

have their inner faces 42 meet in a vertical plane I radial to the moldcarriage. 'I'he mold sections are removably mounted on a pair of slideblocks -or frames 43, the latter having pins 43l which extend throughperforated lugs 48 on the mold sections. T'he slides 43 are slidablymounted in carriers 44, the latter formed with guideways 45 by which theslide blocks 43 are guided and given a- 'straight line movement in saidcarriers. .The carriers 44A are formed with arms 46 pivotaly connectedby a. pivot pin 41 extending upward from a supporting plate 48.

Each of the carriers 44 is formed with an extension 49 on the under sideof which an air motor 58 is 'mounted The motor piston is connectedthrough a piston rod 52 and link 53 to a pair of toggle links 54 and 55.The link 54 is connected by a pivot 56 to the slide block 43 and thelink 55 is connected by a pivot 51 to the extension 49 of the carrier44.

The air motors 58 are actuated by air supplied through the vpressurepipe 35 (Flg. 1) under the control of a valve 68. Air is conducted fromthe valve to the inner ends of the motor cylinders through a pipe 6| andbranch pipes 62. Pipes 63 extend from the outer ends of the motorcylinders and are connected to the upper end of the valve cylinder. Thevalve is controlled by a stationarycam 64 which operates through a bellcrank 65 to lift the valve. The-.valve is low' ered by a spring 66. Theair motors 58 operate to impart an initial opening movement to the mold,by moving the slide blocks outwardly to pointed out hereinafter. Thefinal opening movement of the mold is effected by a pair of moldoperating levers 61 which swing about a pivot pin 68. The outer ends ofthe levers are connected through links 69 Lto the carriers 44. Thelevers 61 are actuated by a stationary cam 18 (Fig. 1) on which runs aroll 1I carried by a slide block 12 movable radially of the machine inguides 13. A link 14 connects the slide block 12 with a slide block 15which runs on guide rails w 16 on the finishing mold frame 36. A pair oflinks 11 are pivoted at their outer ends to the mold operating levers61, said links being connected by a pivot pin 18 to the slide block 15.When theslide block 12 is moved inward toward 15 the axis of the machineby the cam 18, it operates through the connections just described toswing the mold operating levers 61 about their pivot 68 and therebyswing the mold carriers 44 about their pivot 41 to the Fig. 5 position,thus 20 separating the mold sections to ay wide open position.

The operation of the mechanism shown in Figs. 1 to 5 will be understoodfrom the foregoing description, but may be summarized as follows: 25Assuming a parison 4| has been formedin the usual manner and thefinishing mold-48 has been closed around the parison while the latter issuspended in the neck mold, the parts being now in the position shown inFigs. l and 3, the 30 parison is blown as'usual to its finished form inthe finishing mold by air supplied from the pipe 35 through the valve33. After the article has been thus blown and is cooled suillciently toretain its shape,the linishing mold is opened. The initial 3;, openingmovement ofthe mold is eiected by the air motors 58 to which air issupplied through` the valve 68 (Figi) under the control of the cam 64.The cam holds the valve in its upper position While the finishing moldremains closed. 40 The opening of the mold is initiatedV when the bellcrank 65 runs off the cam, permitting the spring 66to lower the valve.This opens the air pressure line 35 through the pipes 6I and 62 to theinner ends of the motor cylinders so that the 45 pistons 5l are movedoutwardly and operate through the connections 52 to 54 to move theslides 43 outwardly, thus separating the mold sections as shown in Fig.4. The cam 18 then operates the levers 61 in the manner heretoforedescribed and thereby swings the mold carriers 44poutwardly about theirpivot 41 to the Fig. 5 position in which the mold is wide open. Thisleaves the bottle or'other blown article 19 supported on a mold bottom88 which is pivoted at 5 8l to the frame 36 and carries a cam roll 82running on a stationary cam 83. The latter is shaped to tilt the moldbottom and discharge the article after the mold is -fully opened.

It will be observed that the body of the bottle 60 19 is substantiallysquare and that the initial opening movement rof the mold sections beingin a straight-line, permits them to be withdrawn from the bottle withoutdistortion of the latter and without its binding in th'e mold. The moldG5 cavities are also cut in the molds with their inner or back surfacesparallel with the meeting faces of the'mold sections, and their sidefaces perpendicular thereto.

Figs.- 6 to 12 illustrate a modied construction in which the straightline movements of the mold sections are spring actuated and controlled,the air motors being omitted. In this construction,'the slide frames. onwhich. the mold sec.- tions 48 are Amounted are moved outwardly for 75Ans of swinging frames 89 which function yas levers, the inner ends ofwhich are pivoted on pivot pins 98 supported inarms 9| on the carriers44.

Links 92 arerpivoted at their linner ends tothe slide frames 43 and attheir outer ends are pivoted to the lever frames 89. f i

When the mold operating levers 61 are actu'- ated for opening the mold,they operate through the links 88 to swing Athe-levers 89 outwardlyabout their pivots. The'slide frames 43 being connected to the levers 89are thus moved outwardly while the carriers-44 remain stationary.

. 'I'his outward movement vof the slide frames is limited by stop pins93 carried by the slide frames and working in slots 944 in the carriers44. The

springs 85 assist in the opening movement of the slide frames 43 withthe mold sections .thereon and Aat the same time oppose any openingmovementl of the carriers 44 about their pivot 41. The springs 85 may beconsidered as the moti-l .vating element for eiecting the initial orbodily movement of the mold sections toward open position. In otherWords, the springs 85 are exerting an outward pull onA the slide blocks43 and this is transmitted through the links-98 and levers 89 to thelevers 61. When the slide frames 43 reach the limit of their outwardmovement relative to the carriers 44 the continued. movement of the Asolevers 61 operates to swingsaid carriers about their pivot 41 forcompleting -the opening movement of the mold. Stopscrews 95 are adjust--ably mounted in the supporting plate 48 in position to engage stop lugs98 on the carriers 4 4. These stop `screws prevent the carriers fromswinging inward beyond their normal 'position assumed while the mold isclosed.

Figs. lato rlziuustrate a. further modification which will nowbedescribed. The movements of the mold carrying slide .frames 43 in thecarriers 44 are controlled by slide plates 91 mounted for reciprocatingmovement on the carriers 44. Said slideplates are provided with camslots 98. Pins 99on the slides 43 extend upwardly through the slots 98.l A stationary cam 10 controls the opening and closing movements of themold. A

' cam roll |08 running on said camz'is carried by a slide block mountedfor movement in guides |82. .Arms |03 fixed tothe slide block areconneared through links. m4 to the ende plates s1.

`When the slideblock |0| is moved inwardly by its cam from the Fig. u13position, the slide plates 91 'are moved tothe right, causing the cams88 to separate the niold sections, the parts being thus brought to theFig. V16 position. Continued movement of the slidev block, |0| thenswings the mold or closedposition determined by the stopsv 95,

vthus preventing premature movement of the 1. A machine for formingglass articles cominitial opening movement oi' prising a mold includingseparable sections having meeting faces, and mechanism for opening themold comprising automatic means for moving the mold sections bodily from'each other in a straight path during the initial opening movement, andmeans for then automatically movi-ng the mold sections'farther apart ina curved path for completing the opening movement of the mold.

2. In a' machine for forming glass articles, a mold comprising separablesections having meeting faces, and mechanism for opening the moldincluding automatic means for separating the mold sections by a straightline bodily movement of one section relative to the other, and means forswinging one said mold section relative to the other through an arc of acircle and thereby completing its opening movement.

3. The combination of a mold comprising seplarable sections havingmeeting faces, slides on .which said sections are mounted, carriers inwhich said slides are slidably mounted for relative bodily movement,mechanism for eiecting a synchronized movement of the slides in thecarriers and y means for swinging each said carrier about an axis.

4.v The combination of a mold comprising sep arable sections havingmeeting faces, slides onwhich said sections are mounted, carriers inwhich said slides are slidably mounted for relative bodily movement.mechanism for effecting a synchronized movement of the slides in thecarriers and means for swinging the carriers toward and from each otherabout a common axis.

' Si) 5. The combination of a mold carriage rotative about a verticalaxis, a mold comprising separable sections, slides on which the moldsections are mounted, carriers on which the slides are mounted forsynchronized, straight line, bodily movement toward and from each otherin a. horizontal direction tangential to the mold carriage, means .forcausing said synchronized movement of the slides on the carriers andthereby moving the mold sections bodily to and from each other, saidcarriers being mounted for movement toward and from each other on themold carriage, operating levers connected to saidfcarriers, and astationary/cam for actuating said levers.

6. 'Ihe combination of a mold carriage rotative about a vertical axis, amold comprising separable sections, slides on which the mold sectionsare mounted, carriers on which the slides are mounted for synchronized,straight line, bodily movement towardv and from each other in ahorizontal direction tangential to'the mold carriage, means for wcausingsaid synchronized movement oi' the slides on the carriers andthereby moving the mold sections bodily' to 1and from each other, saidcarriers being .-pivotally mounted for swinging movement 5 towardandfromeach other on the mold carriage,

operating levers connected to said carriers, and a stationary cam foractuating said levers.

7. The combination ol' a mold comprising partible'sections having theirmeeting faces in a plane carriers supporting the mold sections, .saidcart f e t to rd an carriers about their pivot 41 and thus fully opensners 'being mmm ed or movem n wa' d' .themoldp Leaf springs |05 areattached'to the carriers 44 and tend vtohold them vin their inner' away`fromA each other, means for'v imparting an j initial opening movementto the mold by a relative straight line bodily movement to the moldsecriers retain a xed relative position, and means vfor then moving thecarriers vapart andthereby tions away vfrom each-other while the moldcar- 0* Able sections having their meeting faces in a plane, o

carriers supporting the mold sections and mounted for swinging movementabout 'an axis in said A plane, means for imparting an initial openingmovement to the mold by a relative straight line bodily movement of themold sections away :trom

each other while the mold carriers retain a fixed relative position, andmeans for then swinging the carriers about said axis and therebycompletingV -swing abouta diierent axis in said plane, said operatinglevers operatively connected to said carriers, and means for actuatingsaid levers after said initial opening movement of the mold andVvthereby completingvthe opening of the mold.

10. 'I'he combination of a mold comprising sepy arable sections havingtheir meeting faces in a plane, slides on which the mold sections aremounted, carriers mounted for pivotal movement and having slideways inwhich the slides are mounted, said slideways being perpendicular to saidplane, means for moving said'slides in said slideway's for imparting aninitialopening movement to the mold, and means for pivotally moving saidcarriers for completing the opening movement of the mold. 11s Thecombination of a mold comprising partible sections, slidescarrying themold sections, carriers in which the slides are mounted for slidingmovement, said carriers mounted for pivotal movement toward and fromeach other, piston motors-mounted on said carriers, operatingconnections between said motors and the slides for moving the latterrelative to the carriers, and meansfor effecting said pivotal movementofthe carriers.

12. The combination of a mold comprising par-l tible sections, slides onwhich the mold sections are mounted, carriers in which said slides'aremounted, said carriers being mounted for swinging movement toward andfrom each other, springs interposed between the slides and carriers andexerting a tension on the slides tending to separate the mold sections,means for holding the mold sections together in opposition to saidsprings, means for releasing the slides tothe action of said springs andthereby imparting an initial opening movement to the molds, and meansfor then swinging the carriers apart and thereby completing the openingmovementof the mold.

13. 'I'he combination of a mold carriage rotatable about a verticalaxis, a mold comprising partible sections having their meetingfaces inal vertical plane radial to the mold carriage, slides carrying said moldsections, means for effecting :straight l-ine movement of said slides,carriers in which said slides are mounted for said straight linemovement to and from each other in a direction perpendicular to saidvplane, said carriers be- 14. The combination of a mold carriagerotatable about a vertical axis, a mold comprising partible sectionshaving their meeting faces in a vertical plane radial to the moldcarriage, slides Acarrying said mold sections, carriers in which saidslides are mounted for straight line movement to and from each other ina direction perpendicular to said plane, said carriers mounted on themold carriage for swinging movement about an axis in said plane, meansfor moving the slides in the carriers and thereby imparting 5 -aninitialopening movement to the mold, and

means for then swinging the carriers apart and thereby completing theopening movement of the mold. f l

` 15.,The combination of a mold carriage rotatable about a verticalaxis, a mold comprising partible sections having their meeting-faces ina vertical plane radial to the mold carriage, slides carrying said moldsections, carriers in which said slides are mounted for straight linemovement 15 to and from eachother in a direction perpendicular to saidplane, said carriers mounted on the mold carriage for swinging movementAabout an axis insaid plane, means for moving the slides in the carriersand therebyl imparting an initial 20 opening movement' to the mold,means for then swinging the carriers apart and thereby comi -pleting theopening movement of the mold, said last mentioned meas'includingoperating levers mounted on the carriage to swing about an axis .therebycompleting the opening movement of the mold.

'17.' 'A machine for forming glass articles, comprising-a mold havingseparable sections with .their meeting faces in a plane, and mechanismfor opening the mold including means for moving said moid sectionsbodily away from each other in a straight path in a directionperpendicular to said plane during the initial opening movement of themold and means for then moving and guiding the mold sections in a curvedpath for completing the opening movement of the mold.

18. A machine for forming glass articles comprising, in combination, atraveling mold car' riage, a mold having separable sections, andmechanism controlled by the movement of the mold carriage operable toopen the mold, said 55 mechanism comprising automatic means for movingeach mold section bodily from the other in a straight path during theinitial opening movement, and means for then moving the mold sec- -vtions in a curved path for'completing the open- 60 ing movement of themold.'

19. In a. machine for forming glass articles, a mold comprisingseparable sections having theirv meeting faces in a plane,and mechanismfor opening the mold including automatic means for '65 separating themold sections by a straight line bodily movement of one section relativeto the other in a direction perpendicular to said plane and means forswinging and guiding a mold section through an arc of a circle andthereby completing its opening movement. i

VICTOR iE. HOFMANN,

